Chris Pratley has posted an entry on his blog announcing the new official name of the Office 12 packages. The best part is that OneNote is now included in some of the Office packages: Office Home and Student. That makes perfect sense considering how well OneNote is situated for students.
Unfortunately, it will not be included in the Standard, Professional, and Small Business versions; however, there is a business level of Office that includes all of the regular Office Apps + Groove + OneNote: Microsoft Office Enterprise 2007.
The upgrade price for current OneNote users: $99.